1 /* Read os9/os9k symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* This module provides three functions: os9k_symfile_init,
22 which initializes to read a symbol file; os9k_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and os9k_symfile_read, which reads a symbol table
27 os9k_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. os9k_psymtab_to_symtab() is the function that does this */
39 #if defined(USG) || defined(__CYGNUSCLIB__)
40 #include <sys/types.h>
45 #include <sys/param.h>
52 #include "breakpoint.h"
55 #include "gdbcore.h" /* for bfd stuff */
56 #include "libbfd.h" /* FIXME Secret internal BFD stuff (bfd_read) */
57 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
61 #include "gdb-stabs.h"
63 #include "language.h" /* Needed inside partial-stab.h */
64 #include "complaints.h"
66 #include "stabsread.h"
68 #if !defined (SEEK_SET)
73 /* Each partial symbol table entry contains a pointer to private data for the
74 read_symtab() function to use when expanding a partial symbol table entry
75 to a full symbol table entry.
77 For dbxread this structure contains the offset within the file symbol table
78 of first local symbol for this file, and count of the section
79 of the symbol table devoted to this file's symbols (actually, the section
80 bracketed may contain more than just this file's symbols). It also contains
81 further information needed to locate the symbols if they are in an ELF file.
83 If ldsymcnt is 0, the only reason for this thing's existence is the
84 dependency list. Nothing else will happen when it is read in. */
86 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
87 #define LDSYMCNT(p) (((struct symloc *)((p)->read_symtab_private))->ldsymnum)
94 /* Remember what we deduced to be the source language of this psymtab. */
95 static enum language psymtab_language = language_unknown;
97 /* keep partial symbol table file nested depth */
98 static int psymfile_depth = 0;
100 /* keep symbol table file nested depth */
101 static int symfile_depth = 0;
103 /* Nonzero means give verbose info on gdb action. From main.c. */
104 extern int info_verbose;
106 extern int previous_stab_code;
108 /* The BFD for this file -- implicit parameter to next_symbol_text. */
109 static bfd *symfile_bfd;
111 /* Name of last function encountered. Used in Solaris to approximate
112 object file boundaries. */
113 static char *last_function_name;
115 /* Complaints about the symbols we have encountered. */
116 extern struct complaint lbrac_complaint;
118 extern struct complaint unknown_symtype_complaint;
120 extern struct complaint unknown_symchar_complaint;
122 extern struct complaint lbrac_rbrac_complaint;
124 extern struct complaint repeated_header_complaint;
126 extern struct complaint repeated_header_name_complaint;
128 static struct complaint lbrac_unmatched_complaint =
129 {"unmatched Increment Block Entry before symtab pos %d", 0, 0};
131 static struct complaint lbrac_mismatch_complaint =
132 {"IBE/IDE symbol mismatch at symtab pos %d", 0, 0};
135 /* Local function prototypes */
137 os9k_read_ofile_symtab PARAMS ((struct partial_symtab *));
140 os9k_psymtab_to_symtab PARAMS ((struct partial_symtab *));
143 os9k_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
146 read_os9k_psymtab PARAMS ((struct section_offsets *, struct objfile *,
150 init_psymbol_list PARAMS ((struct objfile *));
153 os9k_next_symbol_text PARAMS ((void));
156 fill_sym PARAMS ((FILE *, bfd *));
159 os9k_symfile_init PARAMS ((struct objfile *));
162 os9k_new_init PARAMS ((struct objfile *));
165 os9k_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
168 os9k_symfile_finish PARAMS ((struct objfile *));
171 os9k_process_one_symbol PARAMS ((int, int, CORE_ADDR, char *,
172 struct section_offsets *, struct objfile *));
174 static struct partial_symtab *
175 os9k_start_psymtab PARAMS ((struct objfile *, struct section_offsets *, char *,
176 CORE_ADDR, int, int, struct partial_symbol *,
177 struct partial_symbol *));
179 static struct partial_symtab *
180 os9k_end_psymtab PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR,
181 struct partial_symtab **, int));
184 record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *,
185 struct section_offsets *));
187 #define HANDLE_RBRAC(val) \
188 if ((val) > pst->texthigh) pst->texthigh = (val);
190 #define SWAP_STBHDR(hdrp, abfd) \
192 (hdrp)->fmtno = bfd_get_16(abfd, (unsigned char *)&(hdrp)->fmtno); \
193 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
194 (hdrp)->offset = bfd_get_32(abfd, (unsigned char *)&(hdrp)->offset); \
195 (hdrp)->nsym = bfd_get_32(abfd, (unsigned char *)&(hdrp)->nsym); \
197 #define SWAP_STBSYM(symp, abfd) \
199 (symp)->value = bfd_get_32(abfd, (unsigned char *)&(symp)->value); \
200 (symp)->type = bfd_get_16(abfd, (unsigned char *)&(symp)->type); \
201 (symp)->stroff = bfd_get_32(abfd, (unsigned char *)&(symp)->stroff); \
211 record_minimal_symbol (name, address, type, objfile, section_offsets)
215 struct objfile *objfile;
216 struct section_offsets *section_offsets;
218 enum minimal_symbol_type ms_type;
224 address += ANOFFSET(section_offsets, SECT_OFF_TEXT);
242 ms_type = mst_unknown; break;
245 prim_record_minimal_symbol
246 (obsavestring (name, strlen(name), &objfile->symbol_obstack),
247 address, ms_type, objfile);
250 /* read and process .stb file and store in minimal symbol table */
251 typedef char mhhdr[80];
266 #define STBSYMSIZE 10
269 read_minimal_symbols(objfile, section_offsets)
270 struct objfile *objfile;
271 struct section_offsets *section_offsets;
276 struct stbsymbol sym;
278 char buf[64], buf1[128];
281 if (fp == NULL) return;
282 abfd = objfile->obfd;
283 fread(&hdr.comhdr[0], sizeof(mhhdr), 1, fp);
292 if (i%2) ch=getc(fp);
295 fread(&hdr.fmtno, sizeof(hdr.fmtno), 1, fp);
296 fread(&hdr.crc, sizeof(hdr.crc), 1, fp);
297 fread(&hdr.offset, sizeof(hdr.offset), 1, fp);
298 fread(&hdr.nsym, sizeof(hdr.nsym), 1, fp);
299 SWAP_STBHDR(&hdr, abfd);
302 init_minimal_symbol_collection();
304 for (i = hdr.nsym; i > 0; i--) {
305 fseek(fp, (long)off, 0);
306 fread(&sym.value, sizeof(sym.value), 1, fp);
307 fread(&sym.type, sizeof(sym.type), 1, fp);
308 fread(&sym.stroff, sizeof(sym.stroff), 1, fp);
309 SWAP_STBSYM (&sym, abfd);
310 fseek(fp, (long)sym.stroff, 0);
319 record_minimal_symbol(buf1, sym.value, sym.type&7, objfile, section_offsets);
322 install_minimal_symbols (objfile);
326 /* Scan and build partial symbols for a symbol file.
327 We have been initialized by a call to os9k_symfile_init, which
328 put all the relevant info into a "struct os9k_symfile_info",
329 hung off the objfile structure.
331 SECTION_OFFSETS contains offsets relative to which the symbols in the
332 various sections are (depending where the sections were actually loaded).
333 MAINLINE is true if we are reading the main symbol
334 table (as opposed to a shared lib or dynamically loaded file). */
337 os9k_symfile_read (objfile, section_offsets, mainline)
338 struct objfile *objfile;
339 struct section_offsets *section_offsets;
340 int mainline; /* FIXME comments above */
345 struct cleanup *back_to;
347 sym_bfd = objfile->obfd;
348 /* If we are reinitializing, or if we have never loaded syms yet, init */
349 if (mainline || objfile->global_psymbols.size == 0 ||
350 objfile->static_psymbols.size == 0)
351 init_psymbol_list (objfile);
354 back_to = make_cleanup (really_free_pendings, 0);
356 make_cleanup (discard_minimal_symbols, 0);
357 read_minimal_symbols (objfile, section_offsets);
359 /* Now that the symbol table data of the executable file are all in core,
360 process them and define symbols accordingly. */
361 read_os9k_psymtab (section_offsets, objfile,
362 bfd_section_vma (sym_bfd, DBX_TEXT_SECT (objfile)),
363 bfd_section_size (sym_bfd, DBX_TEXT_SECT (objfile)));
365 if (!have_partial_symbols ()) {
367 printf_filtered ("(no debugging symbols found)...");
371 do_cleanups (back_to);
374 /* Initialize anything that needs initializing when a completely new
375 symbol file is specified (not just adding some symbols from another
376 file, e.g. a shared library). */
379 os9k_new_init (ignore)
380 struct objfile *ignore;
382 stabsread_new_init ();
383 buildsym_new_init ();
386 init_header_files ();
390 /* os9k_symfile_init ()
391 It is passed a struct objfile which contains, among other things,
392 the BFD for the file whose symbols are being read, and a slot for a pointer
393 to "private data" which we fill with goodies.
395 Since BFD doesn't know how to read debug symbols in a format-independent
396 way (and may never do so...), we have to do it ourselves. We will never
397 be called unless this is an a.out (or very similar) file.
398 FIXME, there should be a cleaner peephole into the BFD environment here. */
401 os9k_symfile_init (objfile)
402 struct objfile *objfile;
405 bfd *sym_bfd = objfile->obfd;
406 char *name = bfd_get_filename (sym_bfd);
407 char dbgname[512], stbname[512];
412 strcpy(dbgname, name);
413 strcat(dbgname, ".dbg");
414 strcpy(stbname, name);
415 strcat(stbname, ".stb");
417 if ((symfile = fopen(dbgname, "r")) == NULL) {
418 warning("Symbol file %s not found", dbgname);
420 objfile->auxf2 = symfile;
422 if ((minfile = fopen(stbname, "r")) == NULL) {
423 warning("Symbol file %s not found", stbname);
425 objfile->auxf1 = minfile;
427 /* Allocate struct to keep track of the symfile */
428 objfile->sym_stab_info = (PTR)
429 xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
430 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
432 DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
433 if (!DBX_TEXT_SECT (objfile))
434 error ("Can't find .text section in file");
436 DBX_SYMBOL_SIZE (objfile) = 0; /* variable size symbol */
437 DBX_SYMCOUNT (objfile) = 0; /* used to be bfd_get_symcount(sym_bfd) */
438 DBX_SYMTAB_OFFSET (objfile) = 0; /* used to be SYMBOL_TABLE_OFFSET */
441 /* Perform any local cleanups required when we are done with a particular
442 objfile. I.E, we are in the process of discarding all symbol information
443 for an objfile, freeing up all memory held for it, and unlinking the
444 objfile struct from the global list of known objfiles. */
447 os9k_symfile_finish (objfile)
448 struct objfile *objfile;
450 if (objfile->sym_stab_info != NULL)
452 mfree (objfile -> md, objfile->sym_stab_info);
455 free_header_files ();
467 #define SYNC (int)0xefbefeca
469 #define SWAP_DBGHDR(hdrp, abfd) \
471 (hdrp)->sync = bfd_get_32(abfd, (unsigned char *)&(hdrp)->sync); \
472 (hdrp)->rev = bfd_get_16(abfd, (unsigned char *)&(hdrp)->rev); \
473 (hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
474 (hdrp)->os = bfd_get_16(abfd, (unsigned char *)&(hdrp)->os); \
475 (hdrp)->cpu = bfd_get_16(abfd, (unsigned char *)&(hdrp)->cpu); \
478 #define N_SYM_CMPLR 0
479 #define N_SYM_SLINE 1
481 #define N_SYM_LBRAC 3
482 #define N_SYM_RBRAC 4
485 struct internal_symstruct {
491 static struct internal_symstruct symbol;
492 static struct internal_symstruct *symbuf = &symbol;
493 static char strbuf[4096];
494 static struct st_dbghdr dbghdr;
495 static short cmplrid;
497 #define VER_PRE_ULTRAC ((short)4)
498 #define VER_ULTRAC ((short)5)
501 fill_sym (dbg_file, abfd)
511 int nbytes = fread(&si, sizeof(si), 1, dbg_file);
515 perror_with_name ("reading .dbg file.");
518 symbuf->n_strx = NULL;
519 symbuf->n_type = bfd_get_16 (abfd, (unsigned char *)&si);
520 symbuf->n_type = 0xf & symbuf->n_type;
521 switch (symbuf->n_type)
524 fread(&si, sizeof(si), 1, dbg_file);
525 symbuf->n_desc = bfd_get_16(abfd, (unsigned char *)&si);
526 cmplrid = symbuf->n_desc & 0xff;
529 fread(&li, sizeof(li), 1, dbg_file);
530 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
531 fread(&li, sizeof(li), 1, dbg_file);
532 li = bfd_get_32(abfd, (unsigned char *)&li);
533 symbuf->n_strx = (char *)(li >> 12);
534 symbuf->n_desc = li & 0xfff;
537 fread(&li, sizeof(li), 1, dbg_file);
538 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
542 strbuf[si++] = (char) ii;
543 } while (ii != 0 || si % 2 != 0);
544 symbuf->n_strx = strbuf;
545 p = (char *) strchr (strbuf, ':');
547 if ((p[1] == 'F' || p[1] == 'f') && cmplrid == VER_PRE_ULTRAC)
549 fread(&si, sizeof(si), 1, dbg_file);
550 nmask = bfd_get_16(abfd, (unsigned char *)&si);
551 for (ii=0; ii<nmask; ii++)
552 fread(&si, sizeof(si), 1, dbg_file);
556 fread(&li, sizeof(li), 1, dbg_file);
557 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
560 fread(&li, sizeof(li), 1, dbg_file);
561 symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
569 /* Initializes storage for all of the partial symbols that will be
570 created by read_dbx_symtab and subsidiaries. */
573 init_psymbol_list (objfile)
574 struct objfile *objfile;
576 /* Free any previously allocated psymbol lists. */
577 if (objfile -> global_psymbols.list)
578 mfree (objfile -> md, (PTR)objfile -> global_psymbols.list);
579 if (objfile -> static_psymbols.list)
580 mfree (objfile -> md, (PTR)objfile -> static_psymbols.list);
582 /* Current best guess is that there are approximately a twentieth
583 of the total symbols (in a debugging file) are global or static
585 objfile -> global_psymbols.size = DBX_SYMCOUNT (objfile) / 10;
586 objfile -> static_psymbols.size = DBX_SYMCOUNT (objfile) / 10;
587 objfile -> global_psymbols.next = objfile -> global_psymbols.list = (struct partial_symbol *)
588 xmmalloc (objfile -> md, objfile -> global_psymbols.size * sizeof (struct partial_symbol));
589 objfile -> static_psymbols.next = objfile -> static_psymbols.list = (struct partial_symbol *)
590 xmmalloc (objfile -> md, objfile -> static_psymbols.size * sizeof (struct partial_symbol));
593 /* Given pointers to an a.out symbol table in core containing dbx
594 style data, setup partial_symtab's describing each source file for
595 which debugging information is available.
596 SYMFILE_NAME is the name of the file we are reading from
597 and SECTION_OFFSETS is the set of offsets for the various sections
598 of the file (a set of zeros if the mainline program). */
601 read_os9k_psymtab (section_offsets, objfile, text_addr, text_size)
602 struct section_offsets *section_offsets;
603 struct objfile *objfile;
607 register struct internal_symstruct *bufp = 0; /* =0 avoids gcc -Wall glitch*/
608 register char *namestring;
610 int past_first_source_file = 0;
611 CORE_ADDR last_o_file_start = 0;
612 struct cleanup *back_to;
616 /* End of the text segment of the executable file. */
617 static CORE_ADDR end_of_text_addr;
619 /* Current partial symtab */
620 static struct partial_symtab *pst = 0;
622 /* List of current psymtab's include files */
623 char **psymtab_include_list;
624 int includes_allocated;
627 /* Index within current psymtab dependency list */
628 struct partial_symtab **dependency_list;
629 int dependencies_used, dependencies_allocated;
631 includes_allocated = 30;
633 psymtab_include_list = (char **) alloca (includes_allocated *
636 dependencies_allocated = 30;
637 dependencies_used = 0;
639 (struct partial_symtab **) alloca (dependencies_allocated *
640 sizeof (struct partial_symtab *));
642 last_source_file = NULL;
644 #ifdef END_OF_TEXT_DEFAULT
645 end_of_text_addr = END_OF_TEXT_DEFAULT;
647 end_of_text_addr = text_addr + section_offsets->offsets[SECT_OFF_TEXT]
648 + text_size; /* Relocate */
651 abfd = objfile->obfd;
655 fread(&dbghdr.sync, sizeof(dbghdr.sync), 1, fp);
656 fread(&dbghdr.rev, sizeof(dbghdr.rev), 1, fp);
657 fread(&dbghdr.crc, sizeof(dbghdr.crc), 1, fp);
658 fread(&dbghdr.os, sizeof(dbghdr.os), 1, fp);
659 fread(&dbghdr.cpu, sizeof(dbghdr.cpu), 1, fp);
660 SWAP_DBGHDR(&dbghdr, abfd);
668 /* Get the symbol for this run and pull out some info */
669 QUIT; /* allow this to be interruptable */
670 cursymoffset = ftell(objfile->auxf2);
671 ret = fill_sym(objfile->auxf2, abfd);
676 /* Special case to speed up readin. */
677 if (bufp->n_type == (short)N_SYM_SLINE) continue;
679 #define CUR_SYMBOL_VALUE bufp->n_value
682 switch (bufp->n_type)
690 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
691 if (psymfile_depth == 1 && pst)
693 os9k_end_psymtab (pst, psymtab_include_list, includes_used,
694 symnum, CUR_SYMBOL_VALUE,
695 dependency_list, dependencies_used);
696 pst = (struct partial_symtab *) 0;
698 dependencies_used = 0;
703 case N_SYM_SYM: /* Typedef or automatic variable. */
704 namestring = bufp->n_strx;
705 p = (char *) strchr (namestring, ':');
707 continue; /* Not a debugging symbol. */
709 /* Main processing section for debugging symbols which
710 the initial read through the symbol tables needs to worry
711 about. If we reach this point, the symbol which we are
712 considering is definitely one we are interested in.
713 p must also contain the (valid) index into the namestring
714 which indicates the debugging type symbol. */
721 enum language tmp_language;
723 valu = CUR_SYMBOL_VALUE;
725 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
726 past_first_source_file = 1;
728 if (psymfile_depth == 0) {
730 pst = os9k_start_psymtab (objfile, section_offsets,
734 objfile -> global_psymbols.next,
735 objfile -> static_psymbols.next);
736 } else { /* this is a include file */
737 tmp_language = deduce_language_from_filename (namestring);
738 if (tmp_language != language_unknown
739 && (tmp_language != language_c
740 || psymtab_language != language_cplus))
741 psymtab_language = tmp_language;
744 if (pst && STREQ (namestring, pst->filename))
748 for (i = 0; i < includes_used; i++)
749 if (STREQ (namestring, psymtab_include_list[i]))
759 psymtab_include_list[includes_used++] = namestring;
760 if (includes_used >= includes_allocated)
762 char **orig = psymtab_include_list;
764 psymtab_include_list = (char **)
765 alloca ((includes_allocated *= 2) * sizeof (char *));
766 memcpy ((PTR)psymtab_include_list, (PTR)orig,
767 includes_used * sizeof (char *));
776 ADD_PSYMBOL_ADDR_TO_LIST (namestring, p - namestring,
777 VAR_NAMESPACE, LOC_STATIC,
778 objfile->static_psymbols,
780 psymtab_language, objfile);
783 ADD_PSYMBOL_ADDR_TO_LIST (namestring, p - namestring,
784 VAR_NAMESPACE, LOC_STATIC,
785 objfile->global_psymbols,
787 psymtab_language, objfile);
791 if (p != namestring) /* a name is there, not just :T... */
793 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
794 STRUCT_NAMESPACE, LOC_TYPEDEF,
795 objfile->static_psymbols,
797 psymtab_language, objfile);
800 /* Also a typedef with the same name. */
801 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
802 VAR_NAMESPACE, LOC_TYPEDEF,
803 objfile->static_psymbols,
804 CUR_SYMBOL_VALUE, psymtab_language,
808 /* The semantics of C++ state that "struct foo { ... }"
809 also defines a typedef for "foo". Unfortuantely, cfront
810 never makes the typedef when translating from C++ to C.
811 We make the typedef here so that "ptype foo" works as
812 expected for cfront translated code. */
813 else if (psymtab_language == language_cplus)
815 /* Also a typedef with the same name. */
816 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
817 VAR_NAMESPACE, LOC_TYPEDEF,
818 objfile->static_psymbols,
819 CUR_SYMBOL_VALUE, psymtab_language,
825 if (p != namestring) /* a name is there, not just :T... */
827 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
828 VAR_NAMESPACE, LOC_TYPEDEF,
829 objfile->static_psymbols,
831 psymtab_language, objfile);
834 /* If this is an enumerated type, we need to
835 add all the enum constants to the partial symbol
836 table. This does not cover enums without names, e.g.
837 "enum {a, b} c;" in C, but fortunately those are
838 rare. There is no way for GDB to find those from the
839 enum type without spending too much time on it. Thus
840 to solve this problem, the compiler needs to put out the
841 enum in a nameless type. GCC2 does this. */
843 /* We are looking for something of the form
844 <name> ":" ("t" | "T") [<number> "="] "e" <size>
845 {<constant> ":" <value> ","} ";". */
847 /* Skip over the colon and the 't' or 'T'. */
849 /* This type may be given a number. Also, numbers can come
850 in pairs like (0,26). Skip over it. */
851 while ((*p >= '0' && *p <= '9')
852 || *p == '(' || *p == ',' || *p == ')'
858 /* We have found an enumerated type. skip size */
859 while (*p >= '0' && *p <= '9') p++;
860 /* According to comments in read_enum_type
861 a comma could end it instead of a semicolon.
862 I don't know where that happens.
864 while (*p && *p != ';' && *p != ',')
868 /* Check for and handle cretinous dbx symbol name
871 p = next_symbol_text ();
874 /* Point to the character after the name
875 of the enum constant. */
876 for (q = p; *q && *q != ':'; q++)
878 /* Note that the value doesn't matter for
879 enum constants in psymtabs, just in symtabs. */
880 ADD_PSYMBOL_TO_LIST (p, q - p,
881 VAR_NAMESPACE, LOC_CONST,
882 objfile->static_psymbols, 0,
883 psymtab_language, objfile);
884 /* Point past the name. */
886 /* Skip over the value. */
887 while (*p && *p != ',')
889 /* Advance past the comma. */
896 /* Constant, e.g. from "const" in Pascal. */
897 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
898 VAR_NAMESPACE, LOC_CONST,
899 objfile->static_psymbols, CUR_SYMBOL_VALUE,
900 psymtab_language, objfile);
904 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
905 if (pst && pst->textlow == 0)
906 pst->textlow = CUR_SYMBOL_VALUE;
908 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
909 VAR_NAMESPACE, LOC_BLOCK,
910 objfile->static_psymbols, CUR_SYMBOL_VALUE,
911 psymtab_language, objfile);
915 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
916 if (pst && pst->textlow == 0)
917 pst->textlow = CUR_SYMBOL_VALUE;
919 ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
920 VAR_NAMESPACE, LOC_BLOCK,
921 objfile->global_psymbols, CUR_SYMBOL_VALUE,
922 psymtab_language, objfile);
931 /* It is a C++ nested symbol. We don't need to record it
932 (I don't think); if we try to look up foo::bar::baz,
933 then symbols for the symtab containing foo should get
935 /* Someone says sun cc puts out symbols like
936 /foo/baz/maclib::/usr/local/bin/maclib,
937 which would get here with a symbol type of ':'. */
941 /* Unexpected symbol descriptor. The second and subsequent stabs
942 of a continued stab can show up here. The question is
943 whether they ever can mimic a normal stab--it would be
944 nice if not, since we certainly don't want to spend the
945 time searching to the end of every string looking for
948 complain (&unknown_symchar_complaint, p[1]);
953 CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
955 HANDLE_RBRAC(CUR_SYMBOL_VALUE);
962 /* If we haven't found it yet, ignore it. It's probably some
963 new type we don't know about yet. */
964 complain (&unknown_symtype_complaint,
965 local_hex_string ((unsigned long) bufp->n_type));
970 DBX_SYMCOUNT (objfile) = symnum;
972 /* If there's stuff to be cleaned up, clean it up. */
973 if (DBX_SYMCOUNT (objfile) > 0
974 /*FIXME, does this have a bug at start address 0? */
976 && objfile -> ei.entry_point < bufp->n_value
977 && objfile -> ei.entry_point >= last_o_file_start)
979 objfile -> ei.entry_file_lowpc = last_o_file_start;
980 objfile -> ei.entry_file_highpc = bufp->n_value;
985 os9k_end_psymtab (pst, psymtab_include_list, includes_used,
986 symnum, end_of_text_addr,
987 dependency_list, dependencies_used);
990 do_cleanups (back_to);
994 /* Allocate and partially fill a partial symtab. It will be
995 completely filled at the end of the symbol list.
997 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
998 is the address relative to which its symbols are (incremental) or 0
1002 static struct partial_symtab *
1003 os9k_start_psymtab (objfile, section_offsets,
1004 filename, textlow, ldsymoff,ldsymcnt, global_syms, static_syms)
1005 struct objfile *objfile;
1006 struct section_offsets *section_offsets;
1011 struct partial_symbol *global_syms;
1012 struct partial_symbol *static_syms;
1014 struct partial_symtab *result =
1015 start_psymtab_common(objfile, section_offsets,
1016 filename, textlow, global_syms, static_syms);
1018 result->read_symtab_private = (char *)
1019 obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
1021 LDSYMOFF(result) = ldsymoff;
1022 LDSYMCNT(result) = ldsymcnt;
1023 result->read_symtab = os9k_psymtab_to_symtab;
1025 /* Deduce the source language from the filename for this psymtab. */
1026 psymtab_language = deduce_language_from_filename (filename);
1030 /* Close off the current usage of PST.
1031 Returns PST or NULL if the partial symtab was empty and thrown away.
1032 FIXME: List variables and peculiarities of same. */
1034 static struct partial_symtab *
1035 os9k_end_psymtab (pst, include_list, num_includes, capping_symbol_cnt,
1036 capping_text, dependency_list, number_dependencies)
1037 struct partial_symtab *pst;
1038 char **include_list;
1040 int capping_symbol_cnt;
1041 CORE_ADDR capping_text;
1042 struct partial_symtab **dependency_list;
1043 int number_dependencies;
1044 /* struct partial_symbol *capping_global, *capping_static;*/
1047 struct partial_symtab *p1;
1048 struct objfile *objfile = pst -> objfile;
1050 if (capping_symbol_cnt != -1)
1051 LDSYMCNT(pst) = capping_symbol_cnt - LDSYMCNT(pst);
1053 /* Under Solaris, the N_SO symbols always have a value of 0,
1054 instead of the usual address of the .o file. Therefore,
1055 we have to do some tricks to fill in texthigh and textlow.
1056 The first trick is in partial-stab.h: if we see a static
1057 or global function, and the textlow for the current pst
1058 is still 0, then we use that function's address for
1059 the textlow of the pst.
1061 Now, to fill in texthigh, we remember the last function seen
1062 in the .o file (also in partial-stab.h). Also, there's a hack in
1063 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1064 to here via the misc_info field. Therefore, we can fill in
1065 a reliable texthigh by taking the address plus size of the
1066 last function in the file.
1068 Unfortunately, that does not cover the case where the last function
1069 in the file is static. See the paragraph below for more comments
1072 Finally, if we have a valid textlow for the current file, we run
1073 down the partial_symtab_list filling in previous texthighs that
1074 are still unknown. */
1076 if (pst->texthigh == 0 && last_function_name) {
1079 struct minimal_symbol *minsym;
1081 p = strchr (last_function_name, ':');
1083 p = last_function_name;
1084 n = p - last_function_name;
1086 strncpy (p, last_function_name, n);
1089 minsym = lookup_minimal_symbol (p, objfile);
1092 pst->texthigh = SYMBOL_VALUE_ADDRESS(minsym)+(long)MSYMBOL_INFO(minsym);
1094 /* This file ends with a static function, and it's
1095 difficult to imagine how hard it would be to track down
1096 the elf symbol. Luckily, most of the time no one will notice,
1097 since the next file will likely be compiled with -g, so
1098 the code below will copy the first fuction's start address
1099 back to our texthigh variable. (Also, if this file is the
1100 last one in a dynamically linked program, texthigh already
1101 has the right value.) If the next file isn't compiled
1102 with -g, then the last function in this file winds up owning
1103 all of the text space up to the next -g file, or the end (minus
1104 shared libraries). This only matters for single stepping,
1105 and even then it will still work, except that it will single
1106 step through all of the covered functions, instead of setting
1107 breakpoints around them as it usualy does. This makes it
1108 pretty slow, but at least it doesn't fail.
1110 We can fix this with a fairly big change to bfd, but we need
1111 to coordinate better with Cygnus if we want to do that. FIXME. */
1113 last_function_name = NULL;
1116 /* this test will be true if the last .o file is only data */
1117 if (pst->textlow == 0)
1118 pst->textlow = pst->texthigh;
1120 /* If we know our own starting text address, then walk through all other
1121 psymtabs for this objfile, and if any didn't know their ending text
1122 address, set it to our starting address. Take care to not set our
1123 own ending address to our starting address, nor to set addresses on
1124 `dependency' files that have both textlow and texthigh zero. */
1126 ALL_OBJFILE_PSYMTABS (objfile, p1) {
1127 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) {
1128 p1->texthigh = pst->textlow;
1129 /* if this file has only data, then make textlow match texthigh */
1130 if (p1->textlow == 0)
1131 p1->textlow = p1->texthigh;
1136 /* End of kludge for patching Solaris textlow and texthigh. */
1138 pst->n_global_syms =
1139 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
1140 pst->n_static_syms =
1141 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
1143 pst->number_of_dependencies = number_dependencies;
1144 if (number_dependencies)
1146 pst->dependencies = (struct partial_symtab **)
1147 obstack_alloc (&objfile->psymbol_obstack,
1148 number_dependencies * sizeof (struct partial_symtab *));
1149 memcpy (pst->dependencies, dependency_list,
1150 number_dependencies * sizeof (struct partial_symtab *));
1153 pst->dependencies = 0;
1155 for (i = 0; i < num_includes; i++)
1157 struct partial_symtab *subpst =
1158 allocate_psymtab (include_list[i], objfile);
1160 subpst->section_offsets = pst->section_offsets;
1161 subpst->read_symtab_private =
1162 (char *) obstack_alloc (&objfile->psymbol_obstack,
1163 sizeof (struct symloc));
1167 subpst->texthigh = 0;
1169 /* We could save slight bits of space by only making one of these,
1170 shared by the entire set of include files. FIXME-someday. */
1171 subpst->dependencies = (struct partial_symtab **)
1172 obstack_alloc (&objfile->psymbol_obstack,
1173 sizeof (struct partial_symtab *));
1174 subpst->dependencies[0] = pst;
1175 subpst->number_of_dependencies = 1;
1177 subpst->globals_offset =
1178 subpst->n_global_syms =
1179 subpst->statics_offset =
1180 subpst->n_static_syms = 0;
1184 subpst->read_symtab = pst->read_symtab;
1187 sort_pst_symbols (pst);
1189 /* If there is already a psymtab or symtab for a file of this name,
1191 (If there is a symtab, more drastic things also happen.)
1192 This happens in VxWorks. */
1193 free_named_symtabs (pst->filename);
1195 if (num_includes == 0
1196 && number_dependencies == 0
1197 && pst->n_global_syms == 0
1198 && pst->n_static_syms == 0) {
1199 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1200 it is on the obstack, but we can forget to chain it on the list. */
1201 struct partial_symtab *prev_pst;
1203 /* First, snip it out of the psymtab chain */
1205 if (pst->objfile->psymtabs == pst)
1206 pst->objfile->psymtabs = pst->next;
1208 for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next)
1209 if (prev_pst->next == pst)
1210 prev_pst->next = pst->next;
1212 /* Next, put it on a free list for recycling */
1213 pst->next = pst->objfile->free_psymtabs;
1214 pst->objfile->free_psymtabs = pst;
1216 /* Indicate that psymtab was thrown away. */
1217 pst = (struct partial_symtab *)NULL;
1223 os9k_psymtab_to_symtab_1 (pst)
1224 struct partial_symtab *pst;
1226 struct cleanup *old_chain;
1234 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1239 /* Read in all partial symtabs on which this one is dependent */
1240 for (i = 0; i < pst->number_of_dependencies; i++)
1241 if (!pst->dependencies[i]->readin)
1243 /* Inform about additional files that need to be read in. */
1246 fputs_filtered (" ", gdb_stdout);
1248 fputs_filtered ("and ", gdb_stdout);
1250 printf_filtered ("%s...", pst->dependencies[i]->filename);
1251 wrap_here (""); /* Flush output */
1252 gdb_flush (gdb_stdout);
1254 os9k_psymtab_to_symtab_1 (pst->dependencies[i]);
1257 if (LDSYMCNT(pst)) /* Otherwise it's a dummy */
1259 /* Init stuff necessary for reading in symbols */
1262 old_chain = make_cleanup (really_free_pendings, 0);
1264 /* Read in this file's symbols */
1265 os9k_read_ofile_symtab (pst);
1266 sort_symtab_syms (pst->symtab);
1267 do_cleanups (old_chain);
1273 /* Read in all of the symbols for a given psymtab for real.
1274 Be verbose about it if the user wants that. */
1277 os9k_psymtab_to_symtab (pst)
1278 struct partial_symtab *pst;
1287 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1292 if (LDSYMCNT(pst) || pst->number_of_dependencies)
1294 /* Print the message now, before reading the string table,
1295 to avoid disconcerting pauses. */
1298 printf_filtered ("Reading in symbols for %s...", pst->filename);
1299 gdb_flush (gdb_stdout);
1302 sym_bfd = pst->objfile->obfd;
1303 os9k_psymtab_to_symtab_1 (pst);
1305 /* Match with global symbols. This only needs to be done once,
1306 after all of the symtabs and dependencies have been read in. */
1307 scan_file_globals (pst->objfile);
1309 /* Finish up the debug error message. */
1311 printf_filtered ("done.\n");
1315 /* Read in a defined section of a specific object file's symbols. */
1317 os9k_read_ofile_symtab (pst)
1318 struct partial_symtab *pst;
1320 register struct internal_symstruct *bufp;
1322 unsigned max_symnum;
1324 struct objfile *objfile;
1325 int sym_offset; /* Offset to start of symbols to read */
1326 CORE_ADDR text_offset; /* Start of text segment for symbols */
1327 int text_size; /* Size of text segment for symbols */
1328 struct section_offsets *section_offsets;
1331 objfile = pst->objfile;
1332 sym_offset = LDSYMOFF(pst);
1333 max_symnum = LDSYMCNT(pst);
1334 text_offset = pst->textlow;
1335 text_size = pst->texthigh - pst->textlow;
1336 section_offsets = pst->section_offsets;
1338 current_objfile = objfile;
1339 subfile_stack = NULL;
1340 last_source_file = NULL;
1342 abfd = objfile->obfd;
1343 dbg_file = objfile->auxf2;
1346 /* It is necessary to actually read one symbol *before* the start
1347 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1348 occurs before the N_SO symbol.
1349 Detecting this in read_dbx_symtab
1350 would slow down initial readin, so we look for it here instead. */
1351 if (!processing_acc_compilation && sym_offset >= (int)symbol_size)
1353 fseek (objefile->auxf2, sym_offset, SEEK_CUR);
1354 fill_sym(objfile->auxf2, abfd);
1357 processing_gcc_compilation = 0;
1358 if (bufp->n_type == N_TEXT)
1360 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1361 processing_gcc_compilation = 1;
1362 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1363 processing_gcc_compilation = 2;
1366 /* Try to select a C++ demangling based on the compilation unit
1369 if (processing_gcc_compilation)
1371 if (AUTO_DEMANGLING)
1373 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1379 /* The N_SO starting this symtab is the first symbol, so we
1380 better not check the symbol before it. I'm not this can
1381 happen, but it doesn't hurt to check for it. */
1382 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
1383 processing_gcc_compilation = 0;
1387 fseek(dbg_file, (long)sym_offset, 0);
1389 if (bufp->n_type != (unsigned char)N_SYM_SYM)
1390 error("First symbol in segment of executable not a source symbol");
1393 for (symnum = 0; symnum < max_symnum; symnum++)
1395 QUIT; /* Allow this to be interruptable */
1396 fill_sym(dbg_file, abfd);
1398 type = bufp->n_type;
1400 os9k_process_one_symbol (type, bufp->n_desc, bufp->n_value,
1401 bufp->n_strx, section_offsets, objfile);
1403 /* We skip checking for a new .o or -l file; that should never
1404 happen in this routine. */
1406 else if (type == N_TEXT)
1408 /* I don't think this code will ever be executed, because
1409 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1410 the N_SO symbol which starts this source file.
1411 However, there is no reason not to accept
1412 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1414 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1415 processing_gcc_compilation = 1;
1416 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1417 processing_gcc_compilation = 2;
1419 if (AUTO_DEMANGLING)
1421 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1424 else if (type & N_EXT || type == (unsigned char)N_TEXT
1425 || type == (unsigned char)N_NBTEXT
1427 /* Global symbol: see if we came across a dbx defintion for
1428 a corresponding symbol. If so, store the value. Remove
1429 syms from the chain when their values are stored, but
1430 search the whole chain, as there may be several syms from
1431 different files with the same name. */
1432 /* This is probably not true. Since the files will be read
1433 in one at a time, each reference to a global symbol will
1434 be satisfied in each file as it appears. So we skip this
1441 current_objfile = NULL;
1443 /* In a Solaris elf file, this variable, which comes from the
1444 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1445 which comes from pst->textlow is correct. */
1446 if (last_source_start_addr == 0)
1447 last_source_start_addr = text_offset;
1448 pst->symtab = end_symtab (text_offset + text_size, 0, 0, objfile,
1454 /* This handles a single symbol from the symbol-file, building symbols
1455 into a GDB symtab. It takes these arguments and an implicit argument.
1457 TYPE is the type field of the ".stab" symbol entry.
1458 DESC is the desc field of the ".stab" entry.
1459 VALU is the value field of the ".stab" entry.
1460 NAME is the symbol name, in our address space.
1461 SECTION_OFFSETS is a set of amounts by which the sections of this object
1462 file were relocated when it was loaded into memory.
1463 All symbols that refer
1464 to memory locations need to be offset by these amounts.
1465 OBJFILE is the object file from which we are reading symbols.
1466 It is used in end_symtab. */
1469 os9k_process_one_symbol (type, desc, valu, name, section_offsets, objfile)
1473 struct section_offsets *section_offsets;
1474 struct objfile *objfile;
1476 register struct context_stack *new;
1477 /* The stab type used for the definition of the last function.
1478 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1479 static int function_stab_type = 0;
1482 /* Something is wrong if we see real data before
1483 seeing a source file name. */
1484 if (last_source_file == NULL && type != (unsigned char)N_SO)
1486 /* Ignore any symbols which appear before an N_SO symbol. Currently
1487 no one puts symbols there, but we should deal gracefully with the
1488 case. A complain()t might be in order (if !IGNORE_SYMBOL (type)),
1489 but this should not be an error (). */
1497 /* On most machines, the block addresses are relative to the
1498 N_SO, the linker did not relocate them (sigh). */
1499 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1500 new = push_context (desc, valu);
1504 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1505 new = pop_context();
1507 #if !defined (OS9K_VARIABLES_INSIDE_BLOCK)
1508 #define OS9K_VARIABLES_INSIDE_BLOCK(desc, gcc_p) 1
1511 if (!OS9K_VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
1512 local_symbols = new->locals;
1514 if (context_stack_depth > 1)
1516 /* This is not the outermost LBRAC...RBRAC pair in the function,
1517 its local symbols preceded it, and are the ones just recovered
1518 from the context stack. Define the block for them (but don't
1519 bother if the block contains no symbols. Should we complain
1520 on blocks without symbols? I can't think of any useful purpose
1522 if (local_symbols != NULL)
1524 /* Muzzle a compiler bug that makes end < start. (which
1525 compilers? Is this ever harmful?). */
1526 if (new->start_addr > valu)
1528 complain (&lbrac_rbrac_complaint);
1529 new->start_addr = valu;
1531 /* Make a block for the local symbols within. */
1532 finish_block (0, &local_symbols, new->old_blocks,
1533 new->start_addr, valu, objfile);
1538 if (context_stack_depth == 0)
1540 within_function = 0;
1541 /* Make a block for the local symbols within. */
1542 finish_block (new->name, &local_symbols, new->old_blocks,
1543 new->start_addr, valu, objfile);
1547 /* attach local_symbols to the end of new->locals */
1548 if (!new->locals) new->locals = local_symbols;
1553 while (p->next) p = p->next;
1554 p->next = local_symbols;
1559 if (OS9K_VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
1560 /* Now pop locals of block just finished. */
1561 local_symbols = new->locals;
1566 /* This type of "symbol" really just records
1567 one line-number -- core-address correspondence.
1568 Enter it in the line list for this symbol table. */
1569 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
1570 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1571 record_line (current_subfile, (int)name, valu);
1574 /* The following symbol types need to have the appropriate offset added
1575 to their value; then we process symbol definitions in the name. */
1582 char *p = strchr (name, ':');
1592 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1593 n = strrchr(name, '/');
1603 if (symfile_depth++ == 0) {
1604 if (last_source_file) {
1605 end_symtab (valu, 0, 0, objfile, SECT_OFF_TEXT);
1610 start_symtab (n, dirn, valu);
1613 start_subfile (n, dirn!=NULL ? dirn : current_subfile->dirname);
1619 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
1620 function_stab_type = type;
1622 within_function = 1;
1623 new = push_context (0, valu);
1624 new->name = define_symbol (valu, name, desc, type, objfile);
1629 valu += ANOFFSET (section_offsets, SECT_OFF_DATA);
1630 define_symbol (valu, name, desc, type, objfile);
1634 define_symbol (valu, name, desc, type, objfile);
1641 if (--symfile_depth != 0)
1642 start_subfile(pop_subfile(), current_subfile->dirname);
1646 complain (&unknown_symtype_complaint,
1647 local_hex_string((unsigned long) type));
1654 previous_stab_code = type;
1657 /* Parse the user's idea of an offset for dynamic linking, into our idea
1658 of how to represent it for fast symbol reading. */
1660 static struct section_offsets *
1661 os9k_symfile_offsets (objfile, addr)
1662 struct objfile *objfile;
1665 struct section_offsets *section_offsets;
1668 objfile->num_sections = SECT_OFF_MAX;
1669 section_offsets = (struct section_offsets *)
1670 obstack_alloc (&objfile -> psymbol_obstack,
1671 sizeof (struct section_offsets)
1672 + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
1674 for (i = 0; i < SECT_OFF_MAX; i++)
1675 ANOFFSET (section_offsets, i) = addr;
1677 return section_offsets;
1680 static struct sym_fns os9k_sym_fns =
1682 bfd_target_os9k_flavour,
1683 os9k_new_init, /* sym_new_init: init anything gbl to entire symtab */
1684 os9k_symfile_init, /* sym_init: read initial info, setup for sym_read() */
1685 os9k_symfile_read, /* sym_read: read a symbol file into symtab */
1686 os9k_symfile_finish, /* sym_finish: finished with file, cleanup */
1687 os9k_symfile_offsets, /* sym_offsets: parse user's offsets to internal form*/
1688 NULL /* next: pointer to next struct sym_fns */
1692 _initialize_os9kread ()
1694 add_symtab_fns(&os9k_sym_fns);